Originally Posted by rldzhao
So, I am considering track tires for my M3. A lot of people here mentioned the Cups, so I did a little research.
The Concept M3 came with 19" CSL + Cups:
However, the OE 19s come with:
Moreover, for 19" wheels, Cups only come in:
Thus, the 235 front and 265 rear seem to be the only possible choices for Cups to be used on the M3. There is a big difference in diameter on possible 18" wheels+tires also.
The stock 245/35 & 265/35 R 19 Sport Cup+ are offered. The difference is in the +
. In fact, they are the only 19" sizes offered, and were likely developed for the M3. Probably were not available when the Concept was released, and probably not available in the US yet. It'd be worth waiting for the right size. See the chart here: